qemu: Disk Geometry Override Support

Qemu command line generation for geometry override and testcases.
Signed-off-by: NJ.B. Joret <jb@linux.vnet.ibm.com>
Signed-off-by: NViktor Mihajlovski <mihajlov@linux.vnet.ibm.com>

src/qemu/qemu_command.c

@@ -2076,6 +2076,8 @@ qemuBuildDriveStr(virConnectPtr conn ATTRIBUTE_UNUSED,
 {
     virBuffer opt = VIR_BUFFER_INITIALIZER;
     const char *bus = virDomainDiskQEMUBusTypeToString(disk->bus);
+    const char *trans =
+        virDomainDiskGeometryTransTypeToString(disk->geometry.trans);
     int idx = virDiskNameToIndex(disk->dst);
     int busid = -1, unitid = -1;
 
@@ -2278,6 +2280,21 @@ qemuBuildDriveStr(virConnectPtr conn ATTRIBUTE_UNUSED,
         disk->type != VIR_DOMAIN_DISK_TYPE_DIR &&
         qemuCapsGet(qemuCaps, QEMU_CAPS_DRIVE_FORMAT))
         virBufferAsprintf(&opt, ",format=%s", disk->driverType);
+
+    /* generate geometry command string */
+    if (disk->geometry.cylinders > 0 &&
+        disk->geometry.heads > 0 &&
+        disk->geometry.sectors > 0) {
+
+        virBufferAsprintf(&opt, ",cyls=%u,heads=%u,secs=%u",
+                          disk->geometry.cylinders,
+                          disk->geometry.heads,
+                          disk->geometry.sectors);
+
+        if (disk->geometry.trans != VIR_DOMAIN_DISK_TRANS_DEFAULT)
+            virBufferEscapeString(&opt, ",trans=%s", trans);
+    }
+
     if (disk->serial &&
         qemuCapsGet(qemuCaps, QEMU_CAPS_DRIVE_SERIAL)) {
         if (qemuSafeSerialParamValue(disk->serial) < 0)
@@ -6723,6 +6740,7 @@ qemuParseCommandLineDisk(virCapsPtr caps,
     int idx = -1;
     int busid = -1;
     int unitid = -1;
+    int trans = VIR_DOMAIN_DISK_TRANS_DEFAULT;
 
     if ((nkeywords = qemuParseKeywords(val,
                                        &keywords,
@@ -6927,6 +6945,44 @@ qemuParseCommandLineDisk(virCapsPtr caps,
                 virReportError(VIR_ERR_INTERNAL_ERROR,
                                _("cannot parse io mode '%s'"), values[i]);
             }
+        } else if (STREQ(keywords[i], "cyls")) {
+            if (virStrToLong_ui(values[i], NULL, 10,
+                                &(def->geometry.cylinders)) < 0) {
+                virDomainDiskDefFree(def);
+                def = NULL;
+                virReportError(VIR_ERR_INTERNAL_ERROR,
+                               _("cannot parse cylinders value'%s'"),
+                               values[i]);
+            }
+        } else if (STREQ(keywords[i], "heads")) {
+            if (virStrToLong_ui(values[i], NULL, 10,
+                                &(def->geometry.heads)) < 0) {
+                virDomainDiskDefFree(def);
+                def = NULL;
+                virReportError(VIR_ERR_INTERNAL_ERROR,
+                               _("cannot parse heads value'%s'"),
+                               values[i]);
+            }
+        } else if (STREQ(keywords[i], "secs")) {
+            if (virStrToLong_ui(values[i], NULL, 10,
+                                &(def->geometry.sectors)) < 0) {
+                virDomainDiskDefFree(def);
+                def = NULL;
+                virReportError(VIR_ERR_INTERNAL_ERROR,
+                               _("cannot parse sectors value'%s'"),
+                               values[i]);
+            }
+        } else if (STREQ(keywords[i], "trans")) {
+            def->geometry.trans =
+                virDomainDiskGeometryTransTypeFromString(values[i]);
+            if ((trans < VIR_DOMAIN_DISK_TRANS_DEFAULT) ||
+                (trans >= VIR_DOMAIN_DISK_TRANS_LAST)) {
+                virDomainDiskDefFree(def);
+                def = NULL;
+                virReportError(VIR_ERR_INTERNAL_ERROR,
+                               _("cannot parse translation value'%s'"),
+                               values[i]);
+            }
         }
     }
 

tests/qemuxml2argvdata/qemuxml2argv-disk-geometry.args

+LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu -S -M \
+pc -m 214 -smp 1 -nographic -monitor unix:/tmp/test-monitor,server,nowait \
+-no-acpi -boot c -drive file=/dev/HostVG/QEMUGuest1,if=ide,bus=0,unit=0,\
+cyls=16383,heads=16,secs=63,trans=lba \
+-net none -serial none -parallel none -usb

tests/qemuxml2argvdata/qemuxml2argv-disk-geometry.xml

+<domain type='qemu'>
+  <name>QEMUGuest1</name>
+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+  <memory>219136</memory>
+  <currentMemory>219136</currentMemory>
+  <vcpu>1</vcpu>
+  <os>
+    <type arch='i686' machine='pc'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu</emulator>
+    <disk type='block' device='disk'>
+      <source dev='/dev/HostVG/QEMUGuest1'/>
+      <geometry cyls='16383' heads='16' secs='63' trans='lba'/>
+      <target dev='hda' bus='ide'/>
+      <address type='drive' controller='0' bus='0' unit='0'/>
+    </disk>
+    <controller type='ide' index='0'/>
+    <memballoon model='virtio'/>
+  </devices>
+</domain>

tests/qemuxml2argvtest.c

@@ -788,6 +788,8 @@ mymain(void)
             QEMU_CAPS_DRIVE, QEMU_CAPS_DEVICE, QEMU_CAPS_NODEFCONFIG,
             QEMU_CAPS_IDE_CD);
 
+    DO_TEST("disk-geometry", QEMU_CAPS_DRIVE);
+
     VIR_FREE(driver.stateDir);
     virCapabilitiesFree(driver.caps);
     VIR_FREE(map);